3216220 has 24 divisors (see below), whose sum is σ = 7719264. Its totient is φ = 1102656.

The previous prime is 3216211. The next prime is 3216221. The reversal of 3216220 is 226123.

It is a junction number, because it is equal to n+sod(n) for n = 3216194 and 3216203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11347 + ... + 11626.

It is an arithmetic number, because the mean of its divisors is an integer number (321636).

Almost surely, 2^3216220 is an apocalyptic number.

It is an amenable number.

3216220 is an abundant number, since it is smaller than the sum of its proper divisors (4503044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3216220 is a wasteful number, since it uses less digits than its factorization.

3216220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22989 (or 22987 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3216220 is about 1793.3822793816. The cubic root of 3216220 is about 147.6098195840.

The spelling of 3216220 in words is "three million, two hundred sixteen thousand, two hundred twenty".